Dialling, Numbering & Addressing Pieter de Kruyff R&S BICK Mobilfunk GmbH

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Transcript of Dialling, Numbering & Addressing Pieter de Kruyff R&S BICK Mobilfunk GmbH

  • Definition of termsDialling & Man Machine Interface (MMI)Addresses and IdentitiesNumbering and AddressingCall ScenariosAgenda

  • Definition of terms(as used in this presentation)

  • TETRA Dialling & MMIMan-Machine Interface MMI - ETR 294Full diallingMode keysSoft keysDisplay scrollingNumber presentation (CLI & TPI)Special numbers e.g. 999/ 112ETSI doc. TR 102 300-5: Leading Digit dialling Relative and Shortened diallingID exchange between user and terminal

  • TETRA Identity


  • How many numbers for a TETRA Terminal?One Family of Home Network TSIsOne Individual TETRA Number ITSIOne Alias of individual Number ATSIOne or more TETRA Group Numbers GTSIsOne or more Families of Visiting Network TSIs Unassigned SSI (USSI)One Visiting Alias (V)ATSIOne or more Visiting Group Numbers (V)GTSIsOne telephone number (E.164)

  • Numbering & Addressing

    Numbering and Addressing PlansBasic NumberingEnhanced NumberingLeading Digit DiallingCall ScenariosHome & Foreign NetworkPABX & E.164

  • Linking TETRA Addressing & NumberingTETRA ADDRESSTETRA NUMBER

  • Basic TETRA Number SSICommunication within home TETRA NetworkNo need for algorithm selectionHome dialling algorithm appliesdecimal value range from 0 to 16,777,215 (224)User may dial between 1 and 8 digits 7 digit with max value 9 999 999 recommendedDecimal digits are converted to binary SSI

  • Enhanced TETRA NumberingCommunication beyond home TETRA Network e.g. another TETRA, PABX, PSTN, ISDNNeed for algorithm selectionSelection of Dialling PlanDirect number entry via keypad, Mode selection buttons, Soft key menu selection, Leading Digit DiallingDTMF can be used to access services outside TETRA networks during a call.

  • Leading Digit DiallingLeading Digit Dialling is the only dialling algorithm selection defined in TR 102 300-5Recommended way to achieve commonality between manufacturers implementationsPredefined value for E.164 gateway access is 16,777,184Predefined value for ISDN gateway access is 16,777,18514 more values reserved for future use.

  • Dialling methodsRelative dialling

    Shortened diallingThe last digits of the own SSI are replaced with the dialled digits to form the identity of the subscriber to be calledThe last digits of a predefined base address (SSI) are replaced with the dialled digits to form the identity of the subscriber to be called

  • Private Numbering PlansA private numbering plan uses a number space which is independent of TETRA SSI or E.164 numbering.The TETRA MoU has prepared two specifications for private numbering:Fleet Specific Short Number (FSSN, TTR001- 7)Radio User Number (RUN, TTR001 - 18)The TETRA Standard describes Short Number Addressing (SS-SNA, ETS 300 392-10-7), which provides a private numbering space of 256 addresses.

  • Fleet Specific Short NumberFSSN uses one million addresses from the SSI addressing space with a base address of 15.000.000. The calling user may dial the FSSN of up to 6 digits, which are added to the base address.The Air Interface provides the transposed number (15.nnn.nnn) to the infrastructure where the number is translated to the real SSI of the called subscriber.The calling subscribers identity is translated to the associated FSSN number and presented as CLI at the called terminal.The FSSN numbering space may be re-used by several user organisations.

  • Radio User NumberThe RUN identifies the user rather than the radio terminal. When the user authenticates himself (RUA, TTR001-17), part of the process is entering his RUN, which is mapped by the system to the ITSI of the used radio terminal. The infrastructure resolves the called ITSI from the called RUN for the routing of the call as well as the calling RUN from the calling ITSI for display as the CLI at the called terminal.The call setup message is addressed to the SSI identifying the RUN application. The RUN is carried in the ESN field in the same way as an E.164 number.

  • Call ScenariosCall originating and terminating on same Network, Call originating and terminating on different NetworksCalls between TETRA and PABXCalls between TETRA and E.164 (PSTN, GSM, TETRA!)

  • Scenario 1- Home NetworkTETRA1234567123456Calling Subscriber

  • Scenario 2 - Foreign TETRA NetTETRA (UK)TETRA (UK)TETRA (France)

  • Scenario 3 - PABXTETRA (A)TETRA (B )ISI

  • Scenario 4 - E.164 (PSTN, GSM)TETRA (UK)TETRA (Germany)E.164 (PSTN, GSM)

  • TETRA IPTETRA uses IP numbers in the same way as any other IP networkIndividual TETRA user can have a fixed IP number or the number can be allocated dynamicallyIn order to do the air interface signalling, TETRA IP numbers need to be mapped to TETRA ITSIs

  • ConclusionsTETRA dialling plans provide the benefits of flexibility and interoperability to meet the huge variety of needs of professional usersTETRA numbering plans have flexibility to efficiently deal both with simple fleet numbers & full E.164 international numbersTETRA addressing alignment allows for future interoperability/ roaming with GSM